Simulation of dynamic behavior of quasi-brittle materials with new rate dependent damage model

Stress-based nonlocal model, Damage, Rate dependency, Dynamic crack-branching Abstract. In concrete often complex fracture and fragmentation patterns develop when subjected to high straining loads. The proper simulation of the dynamic cracking process in concrete is crucial for good predictions of the residual bearing capacity of structures in...

Modelling dynamic tensile failure of quasi-brittle materials using stress-enhanced nonlocal models

The development of realistic numerical tools to efficiently model the response of concrete structures subjected to close-in detonations and high velocity impacts has been one of the major quests in defense research. Under these loading conditions, quasi-brittle materials undergo a multitude of failure (damage) mechanisms. Dynamic tensile failure...

Damage prediction in a concrete bar due to extreme dynamic loading

Security-sensitive structures, such as military facilities, government buildings, strategic industrial infrastructures, bridges, dams, etc. should be designed to withstand explosions and high velocity impacts, both from terrorist attacks and other acts of war. Since concrete is the most widely used construction material understanding concrete...

Damage prediction in a concrete bar due to a compression and tension pulse: A comparison of the K&C, the CSCM and the RHT material models in LS-DYNA

Advanced Finite Element codes provide the possibility to simulate high rate loading on concrete targets as ballistic impact and explosions. Although damage to RC structures due to these loadings can be simulated and detailed results can be obtained the predictions are still far from perfect. It is well known that the results strongly depend on...